KJG Hollow Paddle Dryer

1. General description of KJG Hollow Paddle Dryer

Hollow Paddle Dryer is a horizontal stirring and heat conduction type drying equipment that can work continuously. Its stirring blade is like ship paddle, so it is called paddle dryer. In foreign countries, it is also called slot dryer or stirring dryer.
Needed heat of the dryer relies on heat conduction to heat indirectly, so during the drying period it doesn't need air or little air to take the moisture away. It greatly reduces the heat loss that took away by air flow and the use ratio of heat is improved, so it is a kind energy saving type drying equipment. Paddle dryer is widely used in petrochemical, chemical, metallurgy, foodstuff, pharmaceutical, pesticide industrials and so on for drying powder, granules, filter cake and seriflux materials.
On the basis of a wide research, absorption and digestion of domestic and foreign advanced technology, our company  improved and optimal designed the wedge hollow paddle dryer. It can indirectly heat or cool paste shape, granules, powder and seriflux materials. It can achieve the operation of drying, cooling, heating, sterilization, reaction and low temperature calcinations, etc. In the equipment, the wedge-shape stirring and heat transfer paddle has high heat transfer efficiency and the heat transfer surface self-clean function

2. Work Principle of Hollow Paddle Dryer

The heat transfer surfaces of hollow paddle dryer includes paddle, stirring shaft, and wall surface. And the heat transfer area of paddle is the great majority, so the structure of the equipment is compact and heat transfer area of unit volume is high. Stirring and mixing make the material turn over tempestuously so that the material can get high heat transfer coefficient, the occupied area and space is small and the plant capital cost is saved. Because the structure of paddle is special, during the drying period, material will be extruded and loosed, drying is strengthened. Loading ratio of drying chamber is high, it can be 80%-90%, drying time can be regulated from a few minutes to a few hours by regulating the feeding speed, the rotary speed of stirring shaft and the loading ratio. And from feeding port to discharging port the movement of material is basically piston motion. It residence time distribution is narrow, so the moisture of product is uniform. The paddle that on the stirring shaft has a certain axial direction angle, so it can dry material continuously.

3. Application of KJG Hollow Paddle Dryer

Environmental protection industry: PTA sewage sludge, electrofacing water sewage sludge, Domestic sludge, oily sludge, papermaking sludge, chemical sludge, boiler soot, offscum of pharmaceutical factory, offscum of sugar factory, offscum of aginomoto factory, coal ash, chicken manure, pig manure.

Petrochemical industry: Polyolefin powder, high and low density polyethylene, linear low density polyethylene, polyacetal powder, nylon 6, nylon 66, nylon 12, cellulose acetate fiber, polyphenylene sulfide, allyl resin, engineering plastics, PVC, PVA, polrvinyl benzene, polypropylene, polyester, polyformaldehyde, styrene~acrylonitrile copolymerization, ethylene~propylene copolymerization

Feedstuff industry: Soy sauce offscum, bone matrix feed, distillers' grains, heels of foodstuff, apple pomace, orange skin, bean pulp, chicken bone feed, fish powder, feed additive and chemical sludge.
Foodstuff industry: Starch, cocoa bean, niblet,
Chemical industry: Sodium carbonate, NPK compound fertilizer, kaolin, bentonite, carbon-white, conductex, phosphogypsum, oxidation sodium fluoride, lime nitrate, magnesium carbonate, sodium cyanide, calmogastrin, barium sulfate, annaline, calcium carbonate, dyestuff, molecular sieve, saponin.

4. Parameters of KJG Hollow Paddle Dryer